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A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
A24D3/00—Tobacco smoke filters, e.g. filter tips or filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces of cigars or cigarettes
A24D3/06—Use of materials for tobacco smoke filters
A24D3/16—Use of materials for tobacco smoke filters of inorganic materials
A24D3/166—Silicic acid or silicates
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FR69100D1955-12-301955-12-30Filtre à cigarette permettant l'élimination des goudrons de la fumée de tabac
ExpiredFR69100E
(fr)